Knife-holder for shapers



w. M; KN0UREK.

' KNIFE HOLDER FOR SHAP ERS.

APPLICATION FILED MAY 12,I920.

Patented Feb. 15,1921.

, UNETED STATES WILLIAM M. KNOUR'EK, OF RIVER FOREST, ILLINOIS.

KNIFE-HOLDER FOR SHAPERS.

Application filed May 12, 1920.

To all whom it may concern:

Be it known that I, IVILLIAM M. KNoU- nun, a citizen of the United States, residing at River Forest, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Knife-Holders for Shapers, of which the following is a specification.

My invention relates to machines for wood working, and has special reference to machinesemployed in the nature'of shapers for cutting, molding, on configurations in the edges of wood or other lumber.

The principal object of my invention is to provide a knife holder and collar for holding the cutting knives employed in out ting the lumber. In the collars now generally employed for holding the knives, the collar rotates at the same high speed as the cutter and spindle, and causes an unnecessary amount of friction against the lumber, and wear upon the pattern when one is employed.

In my special construction of knife holder and collar, all friction between the collar and lumber, or pattern is eliminated thereby avoiding the continuous wearing out of the pattern, as is done with the ones now in use.

I have also provided special means for retaining the lubricant within my said knife holder and collar, thereby reducing the friction within said holder, and facilitating its continuous operation at a high rate of speed without frequent stoppage for purpose of lubrication.

I attain the foregoing and other objects hereinafter more particularly set forth, by the special construction and operation described in the following specification, and shown in the accompanying drawings, in which like numerals of reference refer to similar parts throughout the various views,-

Figure 1 is a top plan view showing my knife holder and collar upon the spindle of a shaper in use.

Fig. 2 is a partial section View along the line 1-1 of Fig. 1.

Referring now 'to the drawings, I have provided a knife holder and collar for the shaper which is shown at 1 in Fig. 1, and which consists of the outer shell or collar 2 for contact with the edge of the lumber to be out, or the edge of the pattern where one is employed. This outer shell or collar 2 is securely mounted upon an outer ball Specification of Letters Patent.

Patented Feb. 15, 1921.

Serial No. 380,914.

raceway as 3. Within said outer ball raceway 3 I have provided the inner ball raceway 4:, having a central opening, with suitable balls as 5 between said raceways for reducing the friction between the parts in operation.

Securely mounted within the central opening of the ball-raceway 4 I'have provided the knife holding member 6, provided with the grooves SS for holding the knives 17, 17, and an oil hole with spring cover as 10. Below said member 6 I have provided a second member 7 also securely mounted within the central opening in said ball raceway 4, forclosing the lower side of said raceway. Said member 7 is substantially the same form as the member 6,-excepting that ithas no grooves 8, and no oil hole. At the outer periphery of said members 6 and 7 I have provided the inward projecting ledges 13, 13 disposed at right angles to the line of centrifugal action, for the purpose retaining the oil within said holder against centrifugal action thereon.

Above the upper member 6, I have provided. the upper block 11 disposed above the cutter knives 17, 17, as shown, for the purpose of firmly holding said knives between said block and said member 6. For this purpose, I have also formed the grooves 12, 12 in the under side of said block, corresponding to the grooves 8, 8 in the memher 6. The upper block 11, and the members 6 and 7 have each suitable openings in the center for fitting the spindle or drive shaft of the cutter head of the shaper upon which they are to be mounted.

I have preferably constructed my said knife holder and collar with the outer shell or collar having an inwardly projecting ledge as 14, within which I have securely pressed the outer ball raceway 3. It will be apparent that said parts may be connected together in any other usual manner, or made in one part, without in any manner departing from the spirit of my said invention.

While I have preferably formed the members 6 and 'Z to be securely pressed within the central opening in the ball raceway a, it will be apparent that they may be connected to said ball raceway in any other usual man ner, or one of said members may be made integral with said ball raceway 4, without in any manner departing from the spirit of my said invention.

I have preferably shown my knife holder parts 6 and '11 as provided with the usual grooves 8, 8 and 12, 12, for retaining the knives. It Will be apparent that when fiat circular cutting knives are employed, that these grooves may be omitted, if desired, Without in any manner departing from the spirit of my said invention.

In operation, the knife holder 1 is placed upon the spindle 18 of the shaper, and the knives 17, 17 inserted in the grooves 8, 8, 12, 12, between the member 6 and the block 11, and held in place by pressure of the set screw 15 upon the cross bar 16 bearing upon the upper side of the block 11. The spindle of the shaper is then rotated by the usual means provided carrying with it the cutter holder and knives. The lumber to be cut is passed along the table in contact with the outer shell or collar 2, and as the knives are rotating at a more rapid speed than the lumber moves, they cut from the edge the configuration desired. In the collar now generally employed to hold cutter knives, the collar rotates at the same speed as the spindle and knives, the friction of the collar against the lumber as it is passed along by said collar is excessive, and the patterns, 7

when used, are frequently Worn out thereby. In my special construction, it will be seen that the outer shell or collar is free to rotate at a different speed from the cutter carrying parts attached to the spindle, and therefore rotates freely against the edge of the lumber or pattern, without friction or Wear of the pattern.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is the following, viz:

A knife holder for shapers having knife clamping disks, one of them consisting of upper and lower members, an outer shell surrounding said members, antifriction bearings between said shell and members, and a valved oil inlet in the upper of said members, said members having annular rims or flanges surrounding said bearing to retain the oil therein.

In testimony whereof, I have hereunto afiixed my signature in the presence of two witnesses.

WILLIAM M. KNOUREK. Witnesses:

AUG. L. Bonm'rn, Onns'rnn W. BROWN. 

